-
Presentation
Presentation
This curricular unit aims to provide the student with the following skills: - to understand the mathematical representation of the components for steady-state analysis of Electrical Power Systems; - to solve load flow problems (AC model) and critically analyze the results; - to carry out control actions in Electrical Power Systems based on load flow results; - to perform symmetrical and asymmetrical short-circuit studies and to draw technical conclusions from the results.
-
Class from course
Class from course
-
Degree | Semesters | ECTS
Degree | Semesters | ECTS
Bachelor | Semestral | 5
-
Year | Nature | Language
Year | Nature | Language
2 | Mandatory | Português
-
Code
Code
ULP732-10367
-
Prerequisites and corequisites
Prerequisites and corequisites
Not applicable
-
Professional Internship
Professional Internship
Não
-
Syllabus
Syllabus
1. Load flow analysis Nodal analysis: bus admittance and impedance matrixes for a n-bus system; Resolution of load flow problems: calculation of bus voltages, power flow in lines, and injected power in the compensation and reference bus; Newton-Raphson and the Fast Decoupled methods; Control of power flow in lines and control of bus voltage; FACTS; Contingency analysis; 2. Short-circuit analysis Mathematical models of network elements; Calculation of symmetrical short-circuit currents using the bus impedance matrix; Symmetric components method: symmetric properties and impedances; Calculation of asymmetrical short circuits: Phase-Ground, Phase-Phase and Phase-Phase-Ground; Computational methods for calculating short-circuit currents.
-
Objectives
Objectives
- To derive the mathematical models representing the steady-state behavior of the various components of Electrical Power Systems; - To solve the load flow problem using different methods, namely the Newton-Raphson and Fast Decoupled Load Flow methods; - To apply techniques and equipment for controlling power flow in transmission lines, particularly capacitor/reactor banks and transformers with tap changers; - To solve load flow problems for systems with n buses using computational tools; - To conduct contingency analysis; - To understand and perform matrix calculations for symmetrical and asymmetrical short-circuit studies, including the digital computation of short-circuit currents; - To analyze the results of load flow problems and short-circuit simulations, drawing relevant technical conclusions.
-
Teaching methodologies
Teaching methodologies
The syllabus content will be covered in theoretical classes through formal exposition and the resolution of simple examples, subsequently applied in theoretical-practical classes through more complex exercises. Students will be encouraged to solve the assignments on the various topics using dedicated software. Non-contact hours will take place in “tutorial guidance” sessions via the e-learning platform (Moodle). To support this process, innovative methodologies will be adopted, combining computational tools and audiovisual resources. Students will create digital models of Electrical Power Systems with a graphical interface, allowing them to explore and understand system behavior interactively. Audiovisual materials will be used whenever possible, promoting autonomous learning and reinforcing both theoretical and practical understanding.
-
References
References
Vitor Meireles, Circuitos Eléctricos, 5ª edição, LIDEL - Edições Técnicas, LDA, 2009, ISBN: 9789727575862
-
Assessment
Assessment
A avaliação é contínua e consiste em duas componentes:
- Dois trabalhos práticos (40% da classificação final)
Os trabalhos práticos serão apresentados e discutidos pelos alunos em aula, sendo o peso da componente oral igual a 55% e o peso do relatório igual a 45%
- Teste final (60% da classificação final)
Em situações execionais a definir pelo docente, o aluno poderá ser pedido a realização de uma prova oral como complemento ao teste final escrito. Nesse caso, o peso da componente oral será igual a 70% e o peso do teste final escrito igual a 30%.
Descrição
Data limite
Ponderação
Trabalho Prático nº 1
(a combinar)
20%
Trabalho Prático nº 2
(a combinar)
20%
Teste Final
(a combinar)
60%
-
Mobility
Mobility
No
